State the law of conservation of h; vtl.nx)8ht electric charge.

  Is it possible for two negative charges to attract each other?,yb*xs8u sx pyi f fht7o9*n2,

  Is it possible for a positiz3hr;4t.d 65jz9o0q v1odq zl cvfts 5ve and a negative charge to attract each other?

  A glass rod is rubbed with a pierg 86i+2+7w )igqlhw xogy ck.ce of silk. During the process the glass rod acquires a positive c2gw il)+x + .grq7 ygcwh6koi8harge and the silk

  A proton carries a

  The model of the atom shows voyk8o59x+ (e l 5mbqavnn2 v/a

  A neutral atom always hra 3m5zk;jdl,as

  An atom has more electrons than protons. Thecs 73bxboqqe -qz/0o2 4(j;vg wuqds 8 atom is

  Materials in which the elecfk4qgxfe fkw;4j g-85 (yuih9 trons are bound very tightly to the nuclei are referred t8 k4ifgf9gku y;-5whj(4qxe fo as

  Materials in which the electrons are bound very loosely tl e8 zmsc7zx4o o(le.6o the nuclei and can move about freely within the material 8.ll(mso7xez e6 4cz oare referred to as

  A negatively charged rod is brought near one end of dzckqc wp*a0 x-(3na4 an uncharged metal bar. The end of the metal bar farthest froxan03-zpwk q c( *c4dam the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. T h/uo fj: dp;5uemo;9yhey are placed near each other on an; jf/yuu5:pem ohd9 ;o insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrobms r6q9hii 0:scope positively?

  An originally neutral electros6moreldsd; b-2utr*;x)f7 x scope is briefly touched with a positively charged glass rod. m6xodex27 d b;)fs;-s*rrtlu The electroscope

  An originally neutral electroscope is grounded briefly whir8qrqf rcgplg5h:)j*z 4a)m 9 le a positively charged98r r)g pqzacq) lgfhmj5*:r 4 glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a dspi26r(xn 4jy5qm*)m 8iryf neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens t6nis r2dp5)( fyq4jixr mym8*o the leaves?

  A large negatively charged object is p3s po7.+ct 6kj-zyeajw 4esm1obo 7u.laced on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball ro .s 7y7ej1+63o- kbst.u4jomoecpa wzlls along the path followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constantdp2bk ;/pmlow y-6 yt *l(ru(u $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first + 0)vsw t: 2r5rynn 3um+)rwrtu wq(xkcharge is larger in magnitude than the u35v mr r0nw wk )y)x(r:r+ 2twtsqu+nsecond charge.

  Sphere A carries a net charge and sphe7mi+) cfco;,e)z2vvckgyx f - re B is neutral. They are placed near each other on an insulated table. Which statement beigyxck o+fmv )z-7c,e)c 2v;fst describes the electrostatic force between them?

  Two charged objects attract each othq,u3 j g cs dk45b:ke0g2zj;nj hh+1djer with a certain force. If the charges on both objects are doubl:h,05s1jjuz d;2j +hcgbe 4qjgkd kn3ed with no change in separation, the force between them

  Two charges are sepa2*1btnko-w2hw scr6 iwl/vb n- q(;h lrated by a distance d and exert mutual attractive forces of F on each other. If the charges sn ww 2tb-*k2-o6n hlw(ih ;v1bcq/lr are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract u (drsvi+g ,w/each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its origingw + d/vuis(,ral value? The force is now equal to

  An electron and a proton are separated by a distance of6 q;e; 6nxqkyx 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electro x;k6ne6qxy q;n?

  An electron and a proton are separated by a distance of 1k9mc80vh xflr 8vukto7 6+4js .0 m. What happens to trc0xmt+6 kf 79h vs8kjul8 vo4he magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happensw4,p:a,jquryyv w (a( to the size of the force on the proton if the electron is moved 0.50 m closer to the a(ra(qyu:w ,y pvw,j4proton?

  A point charge of +Q is placed at uq sdm.4vbdw1eoszk+7 j7/-uxr4qwj):z* lp the center of a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatic force of 2.0 N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other t +7e*uwld 4. r :spxv-/qu)j ksjqzzdbwo14m7 hree corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the ( t7,xnucgfm * +x+shhv l7140spflec centroid of an equilateral triangle. When a second charge of xelf1 g7 tpsm0h7sl+(ncux*h ,4+fcv+Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is vgxl6g,4 gfjn sh4r-+.k af*unot a vector?

  At twice the distance from a point charge, the strength of the xbewpgev( l4/p*o:pv -qadj/2-hny; electric field

  Is it possible to have a zero electric field value between a negative z.trtw w. k6zlg2l.+h and positive charge along the line jorl2kzwwgzl+. .6t .thining the two charges?

  Is it possible to have a zero electric fikshna/nje -yk)g+l2 c vbz.)5 eld value between two positive charges along thk)z+)eayj knbsg 2-cn h. 5lv/e line joining the two charges?

  Electric field lines near psitive pointx3lx-t2x v jy5 hk:-et charges

  The electric field shown ,iva,b*)9xd2w * giq nv.2/f jdsgznm)b4 dak

  Can electric field lines intersect in free sph;qgng - *)j b+f59pfgd 1nvypace?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elec3j1h 1)knjxb k.p2m ottric field. Give j11n mhtj2.x3)pbkkoa statement concerning the electric field in the block's interior.

  If a solid metal sphere g)rzy pgr2 8z.and a hollow metal sphere of equal diameters are each given thezyzgpr28 r.) g same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in 7th nf*x9l gmf 8kw+)dcaf(( fa region where a uniform electric fih twmf+df(8gxa l c) f7kf(*n9eld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neaf,08f/ ww gghpr an electric charge

  A positive point charge is enclosed in a hollow metallic sphere th7.qfyto /vo5f at is grounded. As compared to the case without the hollow sphere, thevyft ./ ofq5o7 electric field at a point directly above the hollow sphere has

State three properties of conductors in static equili*g 7 coxyt,ikx;g/;6vz u vb9ththj,(brium.

State Gauss's law.

  The charge carried bycipfb1c88a g 0 one electron is $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +k;iepi;lp9pm, cq0e,2.00 mC. How many more protons than electrons does thmpie qkc,;il pp;,0 9eis piece of plastic have?

  What is the charge on 1 k2 cr uc1n *ii:)w2tyycg of protons?

  An atomic nucleus has a char*mkw nhet)y+g( ev6s;ut.x 7q ge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sepa q(k oys,whr:94rdw4 irated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force w,idqrs h9oy(4: k4 rwbetween them?

  A 1.0-C charge is 15 m from a xl 9x/sl+( dposecond charge, and the force between them is 1.0 N. What is the magnitude of the second cdl/xxl +s9 p(oharge?

  Two 1.0-C charges have a force between them of 1.8t gzc;chfj3 70 N. How far apart are they?

  The force between a z rlsld;dz x9i1k*.e.8qo7urj i( ml bb, j+l/$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-Nc4q 3* 2syegoc* ,a rpwlwr2.c force. If they are moved to a new separation of 8.0 cm, what is the electri24qg e.wlcwscaypc,*r* 3or2c force between them?

  Three identical point chai:lwy c,y 9om gu:yc;5rges of 2.0 mC are placed on the x-axis. The first charge is at the origi w yulc,ogcyi:9:;m5yn, the second to the right at x = 50 cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A ch2+v: a 5qponwwarge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magnitude and direction of the electrostawav+5opw: 2nq tic force which acts on the charge at the origin?

  Three point charges d r1 i-yp2bifr 8fx5oo;i0 rzt:e1n)x are located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-prr i in e-otzfoxr:bi215;y)xfd180mC charge?

  A point charge of +Q is placed at the center of)/nb gz2b7zbt a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lowe bz b2)gbtzn/7r-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 =uim9n z wrrh7: .(*hrd 5.0 nC is at (0, 0). What is the(:wr .*nurh m 7zd9rih magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0+bcbhi7 8/9k9tvsl cg ajg/npd3 1wq8); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction o /hbv p winsjqct7c93gkb1g8la9d/8+f the net force on the 5.0 nC charge?

  Three identical charges of-b kzz3 -o j9vnm8sz (8ckk2nr 3.0 mC are placed at the vertices of an equilateral triangle which measures 309z zjm-8-b kk zc(nn s823vork cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated b(daidooi5.0y y 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force .o0(yi 5dadoi acting on it would be zero?

  A +3.0-C charge is at the origin and ey3 hli0, n5rla +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third cha50ny ,ilerl3hrge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q ig+bl.brj9h6 8c:o2ge nb1 rjcs placed at x = 2a. Where can a third positive charge +q be placed cg1b:2b8he6 jc9j rr+gn. l boso that the force on it is zero?

  A copper penny has a mass of 3.0 g. A t j8qgve4f6ll (*nq ca;otal of $4.0 \times 10^{12} \; electrons$ are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?

  An electron is held up against the force of gravity by the attractioeikectc: ;w jgx-6 o3 i3b78oln of a fixed proton some distance above it. How far above the electron is the protonojx o; w-:ek8it eg37c3bl6ci ?

  Two 0.20-g metal spheres are hung from a common point by nonc1u4ks77w ( xd ci(gqononducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart unt w7udkig(n4 17x (oscqil the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnl5.ach +pks 8vitude of the electric field at a distance+vp8s .akcl5 h of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a dislhd nv9 6kf(zw 2wziz ,*m4hc4tance of 1.50 m from a 50.0-nC charge4 6 hzw9zh*4mfdz (,nvk2i clw?

  A 5.0-C charge is 10 m from 1(cnnjhl34 dw a small test charge. What is the magnitude of the electric field at the locatio3 n4nc1(jhl dwn of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direci.fxg:)j7yl(c- gdw a tion of the electric fxdwlc(.jyg:-7 a)i f gield?

  A 5.0-C charge is 10 m from afwkhx2 wnvs :tn2(w 91 small test charge. What is the magnitude of the force experienced f nvh21wn 2wsx:wk9 (tby a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a val frl,ir/*lgie + ;.l7u. jm)qlkrb2ktue of 3.0 C and are separated by a distance of 4.0 m. What is the electri l;..j/rufr2 q*7glkti,lirkb +lem )c field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm markazsgu8y1,*f ,vpsbt /y,zkb; of a meter stick and a -4.0 mC charge/ tyfy1,,u; *s ,bsakzgbzp8v is placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter sti8sn;oh h5(hchyvr sr 4nb5i-)p6b3t yck and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is s5)ch;rn 8i h p4r bbots v3hy6(h5-nythe electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are plbs.fpu x- kugx3va17;pk vj:lo(d;.vaced at x = 0 and x = 0.20 m. What is the magniv.x1uj-vlkbo f;kupgxv 7s d:( ;p.a3tude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners 2osmhj4vq+3 n zb4a *qof a square of side 0.50 m. The last corner is occ4+4b2j q *szavnmqho3upied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Cha6fcf.w .cl3zzw1zvti: o6z:z rges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mzz6f6vczi ltz ww3z.::oc1f. C at (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a char1j9gy 4tw/m fdg+b7cage of 5.0 mC when it is placed in a uniform electric field. Whatwt1dm g4gfyc 7/bj a9+ is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has8xamcb4bn2j3 a mass of $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of /;c619 jhxpv* mo,7hcuwqvln mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be sus9,xpwmv h o v qn7jhulcc1;/*6pended?

  A foam ball of mass 0.159 vk4t8is8vwb+as* 7lg o/n9p*ylvp n 0 g carries a charge of -2.00 nC. The ball is placed inside a uniform elen 4*nak/o sv8 9v9wgbl8+lp*ysipv7tctric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm cai j gatl2 6u31iyn5y:grries a charge of +2.0 mC. What is the magnitude6uyyg13lan5 gji t 2:i of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the elefn12jdd*v cp.*yv; f ictric field 6.0 cm from the center of the sp* *vdyj d1cnv f;p.if2here?